OK, I can now answer my own question.
I upgraded from 6 year old 4 cores i7490K to a fresh new box with 19 10900K (10 cores, fastest single core speed in retail market, at least this month), 32 GB DDR4 Ram, ITB NVIe SSD, RTX 3080 GPU etc.
Short answer is, yes there is definitely some improvement, but far less than hoped, much of the time. Certainly things are a bit more snappy in 3D, and when selecting an item from a complex scene etc, but subjectively I would rate the upgrade, between CPU anf GPU, as giving maybe a 30% 'experience'/frustration level improvement overall in my current large teamwork project .
Still quite slow working with trace reference on.
Am still also seeing about as much lag during any teamwork operation, despite the BIMserver just having been moved to a new dedicated machine + upgraded from HDD to SSD drives (it had been doubling as a file server apparently!) - and while far less crashing is now occurring now, speed not actually much changed during any teamwork operations.
I don't think this is a straightforward network issue - every time I click Send/Receive- there is a several minutes delay while a steady 0.1MB/s network activity is maintained before, during and after the send and receive, despite both BIM server PC and my PC being on 200MB/s fiber connection in same city. No surges to speak of in CPU or RAM utilization at my end during this process. Data is being exchanged at a trickle in other words, far from saturating network or system capacity.
Am guessing any bottleneck must be with the BIM server conducting some CPU intensive task at other end, maybe scanning database for differences and implications based on my 20 or 30 changes (which in themselves probably don't entail much data)?
This lag remains frustratingly true even late at night with no other users connected/potentially competing for server resources and bandwidth.
PAUL KING
https://www.prime.net.nz
ArchiCAD 8-26
Octane Render Plugin for ArchiCAD
Twinmotion 2022
Windoze 11
Intel Core i9 10900K
Nvidia Gforce RTX 3080
32 Gb DDR3
2x4K 42" monitor extended desktop